Should I replace my seven-year old car battery?

I own a 2010 Renault Scenic 2.0-litre, which I bought in August 2013. As far as I know, it came with the original battery, and I've not replaced the battery since. I have had no trouble with it (apart...

Do you have advice for replacing a car battery?

When replacing a car battery, what would happen if I took the clamps off in the wrong order?

What's the best car battery?

I need to buy a new car battery. Should I opt for Halfords or another make?

If I change the battery in my BMW does it need to be reprogrammed?

I have a 2012 BMW 520d. The battery is the original and would not start the car after not being used for two weeks. It's fine when I use the car regularly. Is this a job I can do myself, or does the battery...